Electrical fuse-box



(NoModel.) l Y J. W. PACKARD.

ELECTRICAL FUSE BOX.

No. 527,071. Patented oon. 9, 1894.

w 60, @'e/J UNiTnD STATES PATENT Ormea.'

JAMES IVARD PACKARD, OF WARREN, OHIO.

ELECTRICAL FUSE-BOX.

SPECIFICATION forming part of Letters Patent No. 527,071, dated October 9, 189s Application filed January 3, 1894. Serial No. 495,549. (No model.) K

To all whom it may concern:

Be it known that I, JAMES WARD PACKARD, of Warren, in the county of Trumbull and tate of Ohio, have invented certain new and useful Improvements in Electrical Fuse- Boxes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention contemplates certain new and useful improvements in electrical fuseboxes and it has for its object the production of a fuse-box which shall possess advantages in point of simplicity, inexpensiveness and general efficiency.

The invention comprises a hollowr fuse-box and a core of non-conducting material in which contact is maintained by a longitudinal spring-pressure.

The invention further comprises a fuse-box having electrical connections at its ends, and

a central core located in said box and held inV fixed contact with said electrical connections.

The invention further comprises afuse-box having electrical connections at its ends, a central core, of non-conducting material, and a spring pressed longitudinally on said core for holding the same securely in position.

The invention also comprises the details of construction, combination and arrangement of parts, substantially as hereinafter fully set forth and particularly pointed out in the claims.

In the accompanying` drawingsz-Figure I is a vertical longitudinal sectional view of my improved fuse-box. Figs. 2 and 3 are transverse sectional views thereof on lines -m, and y-y, respectively. Fig. 4 is a vertical longitudinal sectional view of a slightly modified form of my fuse-box. Fig. 5 is a view of a second slight modification. Fig. 6 is a detail thereof.

Referring to the drawings, A designates the fuse-box, proper, preferably made of porcelain or other non-conducting material and having a central cylindrical borectopen at one end. In this latter end is located a brass ring a having opposite slots a2. This ring is held by a screw a3 passed through a hole in the bottom of the box.

B is a brass-block located at the inner end of bore a and held against the rear end of box A by a screw b passed through a hole in said box. In' this block B is a central hole in which fits a rod O.

D is the central core also preferably formed of porcelain and having recesses d in its outer end to serve as thumb-holds. In a groove or cut away portion d at the inner end of this core is fitted a brass-blockE held by a lower screw c, directly opposite to which is a small screw e" fitted in said block. In a bore e2 of this blockiits the headed end of rod C against which bears a spring e3 which serves to hold the end of said rod tight against the screw b. In a forward recess of core D is fitted a second brass-block F having lateral arms f which pass through slots a2 of ring a when the core is being inserted and the latter is then turned, the contact of said arms against said ring serving to hold' the core in place under the tension of the spring. This block F is' held by a lower screw f', directly opposite to which is a screw f2 screwed into said block. The current of electricity enters from the mains by a wire 00 held by a screw b and passing through said screw is transmitted t0 brassblock E by rod C and from said block to the forward brass-block F by the fuse wire m held by screws e an d f2. The current is transferred through the lateral arms of block F to ring d and thence through the screw a3 to wire :1:2 which leads to the converter` (not shown.) If the current is too heavy it will burn out the fuse wire which forms the connection between the brass-blocks of the central core.

In Fig. I I have shown means whereby, if desired, the connecting rod and coiled spring may be dispensed with. In this instance I attach a bent plate-spring G direct to the rear brass-block g of the fuse-box' and against it is designed to bear the rear brass-block g of the core, said plate spring serving to hold the core in place and forming the electrical connection between said blocks.

In Figs. 5 and 6 the ring at the forward end of the box is not used and in lieu I employ a brass-block I-I in a curved groove of which ts the head of the lower screw h of the forward block of the core.

It will be seen that when. the core is inserted and rotated to position the rotation IOO and the spring pressure have the effect of brightening the points of contact and thereby greatly increasing the advantages gained by the use of my invention.

lVhile I claim the advantage gained by my invention in that the core can be held in position and absolute contact can be made by the use of a single spring exerting a longitudinal pressure thus reducing possibility of noncontact, yet it will be apparent that the end desired may be attained by the use of more than one spring.

I claim as my inventionl. A fuse-box having a central longitudinal bore or chamber open at one end and closed at the other and having fixed electrical contacts at each end, a central longitudinal core located in said bore or chamber and having the fuse-wire connected to its ends, and a spring bearing against said core holding the same in position with one end in direct engagement with one of said electric-contacts and forming the connection between the other end of said core and the other one of said electrical contacts, substantially as set forth.

2. A fuse-box having a central longitudinal bore or chamber open at one end and closed at the other and having an electrical contact block at said closed end and an electrical Contact at the other, or forward end, a central longitudinal core located in said bore or chamber and having blocks at its ends, the fusewire connected to Said blocks, and a spring bearing against said core holding the forward one of said blocks in Contact with said forward electric contact of said box, and forming the contact between the other one of said blocks of said core and the said contact block at the closed end of said box, substantially as set forth.

3. The combination with the box having an electric contact-ring at one end, the contact block at the other end, and the screws hold ing said ring and block, of the core having a block at each end, one of said blocks having projecting portions in engagement with said ring, andthe spring bearing against said core and forming the contact between the other one of said blocks of said core and the contact block of the box, substantially as set forth.

4. The combination with the box having the ring at one end provided with opposite slots, the block having a central hole, and the screws holding said block and ring, of the core having a block at each end, one of said blocks being provided with lateral arms designed to be inserted through said slots, the bent plate impact spring in contact with one of said blocks of said core, and the fuse-wire, substantially as set forth.

In testimony whereof l have signed this specification in the presence of two subscribing Witnesses.

JAMES VARD PACKARD.

Witnesses:

EDWD. M. SUTLIFF, Gno. W. UPToN. 

